MESON Chess Problem Database

Problem Display
PID: 202661 (4r3/4nB2/8/R1b2k2/4p2R/2B2r1N/4NQp1/5nK1 w - - 0 1)

Nagy, Odon

Magyar Sakkvilag, 1923

4r3/4nB2/8/R1b2k2/4p2R/2B2r1N/4NQp1/5nK1

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rxf4#
    • 1...Sd2
      • 2.Sg3#
    • 1...Sh2
      • 2.Sg3#
    • 1...Se3
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...e3
      • 2.Qxf3#
  • Keys
    • 1.Sef4!
      • threat
        • 2.Be6#
      • 1...Rxc3
        • 2.Sd3#
      • 1...Rxh3
        • 2.Sxh3#
      • 1...Rxf4
        • 2.Rxf4#
      • 1...e3
        • 2.Qc2#
      • 1...Sd5
        • 2.Bg6#
      • 1...Sc6
        • 2.Bg6#
      • 1...Sg6
        • 2.Bxg6#
      • 1...Sc8
        • 2.Bg6#
      • 1...Sg8
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::R1(F),XR(c)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD,N_PINQ(C)::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • P(d);N_PINQ(C)::QAR2(C),XR(c)
  • Actual
    • S(B);N_PINR(c)
    • Threat
      • B(H)
    • Vars
      • R(c);XB(D)::QAR(C)+S(B)
      • R(c);XS(E)::QAR(C)+S(B),XR(c)
      • R(c);OGATE,P_SPINR(c),XS(B)::R1(F),XR(c)
      • P(d);N_PINQ(C)::QAB(C)
      • S(g);N_GUARD,N_SPINB(e)::B(H)
      • S(g);N_GUARD::B(H)
      • S(g);N_GUARD::B(H),XS(g)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).